JP2000086480A - Chapped skin treating cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject cosmetic having high safety, very excellent chapped skin curing effect and excellent use feeling by including a phospholipid, a silicone oil and an antiphlogistic. SOLUTION: This cosmetic is obtained by including (A) 0.01-10.0 wt.%, preferably 0.1-5.0 wt.% more preferably 0.2-3.0 wt.% of a phospholipid, (B) 0.01-80.0 wt.%, preferably 0.02-40.0 wt.% of a silicone oil and (C) 0.0001-10.0 wt.%, preferably 0.001-5.0 wt.% of an antiphlogistic. As the component A, phosphatidyl choline, sphingophospholipid or the like is exemplified and its analog or a composition containing it, that is, soybean lecithin, yolk lecithin, its hydride or the like may be used. As the component B, dimethylpolysiloxane, methylphenylpolysiloxane or the like is exemplified. As the component C, a glycyrrhiziate, a glycyrrhiza extract or the like is exemplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an anti-inflammatory agent which is effective in suppressing inflammation, and is excellent in feeling of use due to a coating effect of phospholipid and silicone oil (silicone emulsion formed of phospholipid) which is excellent in safety. The present invention relates to a cosmetic having a synergistically excellent effect of improving rough skin.

[0002]

2. Description of the Related Art Conventionally, rough skin and inflammation have been prevented,
Various anti-inflammatory agents have been used to repair the skin to a healthy state.

However, the inflammation-suppressing effect is not sufficiently exhibited only by blending these anti-inflammatory agents into cosmetics, which are complex mixed systems. In addition, there is a problem that even though the skin can be temporarily kept in a healthy state, the durability is poor and it is not possible to repair the rough skin.

[0004] On the other hand, phospholipids are conventionally known as natural materials having high safety. In the cosmetics field, creams, emulsions, lotions, and the like are used as emulsifiers or humectants.
Used for foundations and the like.

[0005] However, conventional preparations containing phospholipids cannot provide an inflammation-suppressing effect and do not provide a sustained improvement effect on rough skin.

[0006]

The present inventors have conducted intensive studies to solve the above-mentioned drawbacks. As a result, the phospholipid silicone emulsion composed of phospholipid and silicone oil formed a highly safe film near inflammation. Formed and found that the synergic effect with the anti-inflammatory agent significantly improves the rough skin improvement effect,
The present invention has been completed. Therefore, an object of the present invention is to provide a novel rough skin improving cosmetic which has high safety, has an extremely excellent effect of improving rough skin, and further has an excellent usability.

[0007]

The object of the present invention is to improve rough skin characterized by containing a phospholipid as the component (A), a silicone oil as the component (B) and an anti-inflammatory agent as the component (C). Achieved by cosmetics.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail as follows. Examples of the phospholipid of the component (A) used in the present invention include phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol, phosphatidylinositol, sphingolipids, and the like. Soy lecithin, egg yolk lecithin and the like, and hydrogenated products thereof are also included.

In the present invention, one or a combination of two or more of the above phospholipids can be used. The compounding amount of the phospholipid of the component (A) is preferably from 0.01 to 10.0% by weight, more preferably from 0.1 to 5.0% by weight, based on the total amount of the cosmetic, and most preferably. 0.2
~ 3.0% by weight. When the content is 0.01 to 10.0% by weight, the stability and the feel of the dosage form are preferred,
When the content is 5.0% by weight, the tendency is remarkable.
When the content is 3.0% by weight, the tendency is more remarkable.

The silicone oil of the component (B) used in the present invention includes dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane and the like.

In the present invention, the above silicone oils can be used alone or in combination of two or more. The blending amount of the silicone oil as the component (B) is preferably 0.01 to 80.0% by weight, more preferably 0.02 to 40.0% by weight, based on the total amount of the cosmetic. 0.
When the content is from 0.01 to 80.0% by weight, the film-forming ability and the feel are preferable. When the content is from 0.02 to 40.0% by weight, the tendency is remarkable.

The anti-inflammatory agent of component (C) used in the present invention is generally a substance having an inflammation-suppressing effect, and includes glycyrrhizinate, glycyrrhetinic acid derivatives and the like. Licorice extract powder, licorice extract and the like are also included.

In the present invention, the above-mentioned anti-inflammatory agents can be used alone or in combination of two or more. The amount of the anti-inflammatory agent of the component (C) is preferably 0.0001 to 10.0% by weight, more preferably 0.001 to 5.0% by weight, based on the total amount of the cosmetic. 0.
When it is 0001 to 10.0% by weight, it is preferable in terms of the inflammation suppressing effect and stability, and when it is 0.001 to 5.0% by weight, the tendency is remarkable.

[0014] In addition to the above-mentioned components, the cosmetic of the present invention may further contain components to be incorporated into skin external preparations or cosmetics, for example,
Oils, surfactants, powders, pigments, dyes, water-soluble polymers,
An ultraviolet absorber, a preservative, a fragrance, and the like can be appropriately compounded as long as the effects of the present invention are not impaired.

The present invention can be applied to dosage forms such as creams, emulsions, lotions, beauty solutions and foundations which are usually used as cosmetics.

The form of the cosmetic of the present invention may be any form generally used in cosmetics such as powder, granule, solid, semi-solid, liquid, paste, gel, etc. And a gel form is preferred.

The cosmetic of the present invention can be prepared, for example, as follows. The water-soluble component and the oil-soluble component were each heated and dissolved at 80 ° C., and the water-soluble component was gradually added to the oil-soluble component and mixed. Next, the mixture is cooled to room temperature with stirring to obtain a cosmetic.

Hereinafter, the present invention will be described in more detail with reference to examples.

[0019]

EXAMPLES Prior to the examples, (1) a rough skin improvement effect test and (2) a moisturizing effect test (TW) used in the evaluation of the present invention.
(L value reduction rate) and (3) Method of practical test (feeling of use) are described.

(1) Test Method for Improving Rough Skin The effect of continuous application for four weeks was examined on 20 middle-aged and elderly female subjects (30 to 50 years old) who complain of rough or dry skin on the lower leg. One day a day at the subject's left lower leg test site
About 1 g of the sample was applied to a 5 × 10 cm surface, and the skin condition before the start of the application and three days after the end of the application was visually determined according to the criteria for skin dryness shown in Table 1. The lower leg on the right side was used as a control without applying the sample.

[0021]

[Table 1]

The judgment results of the test site and the control site before and after the test are compared, and when the degree of dryness of the skin is improved by two or more stages (for example, + →-, ++ → ±), it is effective. Somewhat valid, no change if no change. The test results were indicated by the number of subjects who were effective or slightly effective.

(2) Moisturizing effect test (TWL value reduction rate) The subject's skin before and after the start of the above-mentioned rough skin improving effect test was targeted. TWL values were measured before continuous application for 4 weeks and on the 3rd day after the completion of application, and the reduction rate of the TWL value (water retention function enhancing effect) was calculated from these values as described below to examine the moisturizing effect.

(Measurement method of TWL value) A method of converting a change in humidity of air on a closed skin surface within a predetermined time into an electric resistance and measuring the same was used. That is, the skin of the subject is sealed with the measuring cell, forced air is passed through the cell to sufficiently replace the inside of the cell with dry air, and then the ventilation of the dry air is stopped and the inside of the cell at that time is stopped. Determined by relative humidity RH _S (%), then left for 10 minutes and again set relative humidity RH in the cell
₁₀ (%) was measured, and a TWL value (mg / cm ² / hr) was calculated from the change in humidity at this time by the following equation. TWL value = [(RH ₁₀ −RH _S ) × Dt × V × 6] /
(S × 100) where Dt: density of saturated water vapor in air at measurement temperature (t ° C.) (mg / l) V: cell volume (l) S: measurement area (cm ² )

(TWL value reduction rate) The TWL value reduction rate was calculated by substituting the TWL values before and after the sample application, TWLA and TWLB into the following equation. TWL value reduction rate (%) = (1−TWLB / TWLA) ×
100 TWLA: TWL value before sample application TWLB: TWL value on the third day after sample application is completed “valid” when the reduction rate of TWL value is 20% or more, and “invalid” when the reduction rate is less than 20% did. The test results are
The number is indicated by the number of subjects who were “effective” out of 20 subjects.

(3) Practical test (feeling of use) The effect of the above-mentioned rough skin improvement effect test on the third day after completion was evaluated. In the test results, for each item of skin wettability, smoothness, and elasticity, the respondents answered that "skin was moistened", "skin became smoother", and "skin became tighter" Indicated by the number of people.

Example 1 Based on the composition shown in Table 2, the rough skin improving cosmetic of the present invention is prepared according to the following production method.

(Adjustment method) The components (A) and (B) were each heated and dissolved at 80 ° C., and the component (A) was gradually added to the component (B) and mixed. Then, the mixture was cooled to room temperature with stirring to obtain a cosmetic.

[0029]

[Table 2]

Example 2 Based on the composition shown in Table 3, the cosmetic of the present invention was prepared by a conventional method.

[0031]

[Table 3]

Comparative Example 1 Based on the composition shown in Table 4, the cosmetic of the present invention was prepared by a conventional method.

[0033]

[Table 4]

Comparative Example 2 Based on the composition shown in Table 5, the cosmetic of the present invention was prepared by a conventional method.

[0035]

[Table 5]

Comparative Example 3 Based on the composition shown in Table 6, the cosmetic of the present invention was prepared by a conventional method.

[0037]

[Table 6]

Table 7 shows the results of the tests performed on the cosmetics of the examples and the comparative examples.

[0039]

[Table 7]

As can be seen from Table 7, Examples 1 to 3 of the present invention are shown.
Comparative Example 1 does not satisfy the essential conditions of the present invention.
As compared with the cosmetics of Nos. 1 to 3, all the properties were excellent.

【The invention's effect】

As described above, the rough skin improving cosmetic of the present invention has a high effect of continuously enhancing and maintaining the moisture retention function of the skin, has a rough skin improving effect by a synergistic effect, and has a practical use feeling. It is clear that it also provides excellent rough skin improving cosmetics.

Claims (1)

[Claims] 1. A rough skin improving cosmetic comprising a phospholipid as the component (A), a silicone oil as the component (B), and an anti-inflammatory agent as the component (C).